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Finding the Fourth Proportional to 792,642.60, 1,188,963.90 and 260,245.80

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Solution

The fourth proportional to 792,642.60, 1,188,963.90 and 260,245.80 is: 390,368.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    792,642.60 : 1,188,963.90 = 260,245.80 : x
  2. Step 2: Convert to fraction form
    792,642.60/1,188,963.90 = 260,245.80/x
  3. Step 3: Cross multiply
    792,642.60x = 1,188,963.90 × 260,245.80
  4. Step 4: Simplify right side
    792,642.60x = 309,422,861,326.62
  5. Step 5: Solve for x
    x = 309,422,861,326.62/792,642.60
  6. Step 6: Final answer
    x = 390,368.70

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.